I believe the answer is D.
Answer: Rajan always drives to work.
Explanation:
'Always' is an adverb of frequency and when it is alone, it is normally used between the subject and the verb.
With <em>Rajan</em> being the subject and <em>'drives' </em>being the verb, always should be placed between <em>'Rajan</em>' and <em>'drives'</em>.
