он получил телеграмму, в которой со

он получил телеграмму, в которой сообщалось, что у его тетки случился удар.

Результаты (английский) 1:

He received a telegram, which reported that his aunts suffered a blow.

Результаты (английский) 2:

he received a telegram informing him that his aunt had a stroke.

Результаты (английский) 3:

he received a telegram, in which it was reported that his aunt had a stroke.