As they waited Rahim argued against war ----
A
while his brother discusses the effects of pollution.
B
while his brother discussed the effects of pollution.
C
while his brother was discussing the effects of pollution.
D
while had brother discussed the effects of pollution.
Correct Answer: while his brother was discussing the effects of pollution.
প্রথমত, Main , while দ্বারা যুক্ত হলে যে clause টির দ্বিতীয়ত, দুটি clause , while দ্বারা যুক্ত হলে যে clause টির শুরুতে while থাকবে সেটি continuous tense হবে।