Step 1: Understanding the sentence.
The sentence suggests that the doctor took an action to send the patient to a specialist. Therefore, the verb should indicate that action of sending or advising.
Step 2: Analyzing the options.
- (A) referred: This is the correct verb choice, as "referred" means the doctor directed the patient to a specialist.
- (B) deferred: This means to delay or postpone, which does not fit the context.
- (C) recommended: While "recommended" could make sense in some contexts, it doesn't strongly convey the action of sending someone to another specialist.
- (D) no change is required: There is a need to change the verb to match the context.
Step 3: Conclusion.
The correct answer is (A) referred, as it most accurately matches the intended action in the sentence.
A weight of $500\,$N is held on a smooth plane inclined at $30^\circ$ to the horizontal by a force $P$ acting at $30^\circ$ to the inclined plane as shown. Then the value of force $P$ is:
A steel wire of $20$ mm diameter is bent into a circular shape of $10$ m radius. If modulus of elasticity of wire is $2\times10^{5}\ \text{N/mm}^2$, then the maximum bending stress induced in wire is: