A sentence with four words printed in bold type is given. These are numbered as (1), (2), (3) and (4). One of these four words printed in bold may be either wrongly spelt or inappropriate in the context of the sentence. Find out the word which is wrongly spelt or inappropriate.
Worried (1)/ that he will fail in the exams, Satish stayed (2) / up the whole kinght (3)/ and studied. (4)

A

Worried

B

that he will fail in the exams, Satish stayed

C

up the whole kinght

D

and studied