Choose the right combined sentence from the following options.

He was going to school. He was caught in the train.

A. Going to school he was in the train was caught.

B. He was caught in the train going to school.

C. Caught in the train he was going to school.

D. While he was going to school, he was caught in train.

Please do not use chat terms. Example: avoid using "grt" instead of "great".