Step 1: Understanding the Theory of Evolution.
The theory of evolution by natural selection was primarily developed by Charles Darwin and Alfred Russel Wallace. Both independently came up with the same idea: that species evolve over time due to pressures from the environment, and the individuals best suited to the environment survive and reproduce. Thus, Charles Darwin and Alfred Russel Wallace are credited with the development of the theory.
Step 2: Analysis of the Options.
- (A) Charles Darwin: Darwin is famously known for his work "On the Origin of Species" where he outlined the theory of evolution by natural selection.
- (B) Jean Baptiste Lamarck: Lamarck proposed an earlier theory of evolution, known as Lamarckism, which involved the inheritance of acquired characteristics, but his theory is not considered correct today.
- (C) Alfred Russel Wallace: Wallace, working independently of Darwin, also proposed the theory of evolution by natural selection and is considered a co-founder of this theory.
- (D) Georges Cuvier: Cuvier is known for his work on catastrophism, not natural selection.
Step 3: Conclusion.
Thus, the correct answers are (A) Charles Darwin and (C) Alfred Russel Wallace.
Final Answer: \boxed{(A) Charles Darwin, (C) Alfred Russel Wallace}
Eight students (P, Q, R, S, T, U, V, and W) are playing musical chairs. The figure indicates their order of position at the start of the game. They play the game by moving forward in a circle in the clockwise direction.
After the 1st round, the 4th student behind P leaves the game.
After the 2nd round, the 5th student behind Q leaves the game.
After the 3rd round, the 3rd student behind V leaves the game.
After the 4th round, the 4th student behind U leaves the game.
Who all are left in the game after the 4th round?

Here are two analogous groups, Group-I and Group-II, that list words in their decreasing order of intensity. Identify the missing word in Group-II.
Abuse \( \rightarrow \) Insult \( \rightarrow \) Ridicule
__________ \( \rightarrow \) Praise \( \rightarrow \) Appreciate
The 12 musical notes are given as \( C, C^\#, D, D^\#, E, F, F^\#, G, G^\#, A, A^\#, B \). Frequency of each note is \( \sqrt[12]{2} \) times the frequency of the previous note. If the frequency of the note C is 130.8 Hz, then the ratio of frequencies of notes F# and C is: