Directions:In the following question, some of the sentences have errors and some are correct. Find out which part of a sentence has an error. The number of the part is you answer. If a sentence is free from errors, then you answer is d:i.e., No error.
A senior doctor / expressed concern / about physicians recommended the vaccine. / No error.
Children enjoy listening to / ghosts stories / especially on Halloween night. / No error.
Choose the option which is most appropriate to fill in the blank
Do not stay in the grasslands after dark, as some animals become ____ when they see humans.