Question:

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A): Osteoporosis is characterised by decreased bone mass and increased chances of fracture.
Reason (R): Common cause of osteoporosis is increased levels of oestrogen.
In the light of the above statements, choose the most appropriate answer from the options given below:

Updated On: May 2, 2025
  • Both (A) and (R) are correct and (R) is the correct explanation of (A)
  • Both (A) and (R) are correct but (R) is not the correct explanation of (A)
  • (A) is correct but (R) is not correct
  • (A) is not correct but (R) is correct
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The Correct Option is C

Solution and Explanation

Assertion (A): Osteoporosis is indeed characterised by decreased bone mass and increased chances of fracture. This is a widely accepted fact in the field of biology and medicine, as osteoporosis leads to weakened bones which are more susceptible to fractures.

Reason (R): The common cause of osteoporosis is not increased levels of oestrogen; rather, it is associated with decreased levels of oestrogen, especially in postmenopausal women. Oestrogen helps maintain bone density, and a reduction in its levels leads to the gradual loss of bone mass.

Conclusion: Based on the above analysis, Assertion (A) is correct as it accurately describes the characteristics of osteoporosis. However, Reason (R) is not correct because it inaccurately states the cause of osteoporosis.

Thus, the correct choice is: (A) is correct but (R) is not correct.

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Concepts Used:

Locomotion and Movement

Locomotion

The movement of a creature from one place to another is known as locomotion. During the process, there is the action of appendages such as wings, limbs, and flagella. In some animals, like fish, whales, and sharks, locomotion upshots from a wave-like series of muscle contractions. Locomotion helps an organism in finding their food, avoid harsh weather conditions, escape from their predators, etc.

Some examples of locomotion are walking, running, swimming, etc. Movement, on the other hand, refers to any type of motion that need not be localized.

Read More: Locomotion and Movement

Movement 

Movement is generally described as a state of changing the position from rest to motion or vice-versa. Movement can be both voluntary movement and involuntary movement. Movement helps an organism perform essential functions, such as pumping blood to the different parts of the body, etc.

Read More: Difference between Locomotion and Movement