Correct option is A
Option (a) is the correct meaning of the given idiom.
Idiom – At one’s elbow: To be
very close or nearby, especially physically. (किसी के बहुत पास होना)
Example: The waiter was
at my elbow throughout the dinner.
Other related idioms:
·
By one’s side – close to someone.
·
Within arm’s reach – very near.
·
Close at hand – easily accessible or nearby.