In this question, sentence is given with blank to be filled in with an appropriate word. Four alternatives are suggested for question. Choose the correct alternative out of the four.
Her father died because they did not immediately __ a doctor.

Options

A. call for
B. call up
C. call at
D. call in

Answer

D

Explanation

call up (Phr.V.) : to make a telephone call to somebody.
call in (Phr.V.) : to ask for the service of somebody : to call in a doctor.
Here, call in is the right usage.