Correct option is A
Option (a) is the correct meaning of the given idiom.
Idiom – "All eyes and ears": This idiom means to be
fully focused, watching and listening attentively. (पूरी तरह सतर्क और ध्यानपूर्वक सुनना/देखना)
Example: The students were
all eyes and ears during the principal’s speech.
Other related idioms and their meanings:
· Keep your ears open – Be alert and attentive.
· On the ball – Being quick to understand and react.
· On one's toes – Being alert and prepared.