Select the most appropriate meaning of the given idiom.
A herculean task

Correct option is B

Option (b) is the correct meaning of the given idiom.
A herculean task: A task that is extremely difficult and requires great effort or strength. (बहुत कठिन कार्य)
Example: Moving the entire library was a herculean task for the volunteers.
Other related idioms and their meanings:
“Move heaven and earth” – To do everything possible to achieve something.
“An uphill battle” – A difficult struggle.
“Bite off more than one can chew” – To take on a task that is too big.