Fill in the gap with appropriate phrasal verb.
The mailman opened the gate, and was immediately ____________ by a large dog.

• শূন্যস্থানে সঠিক উত্তর হবে - set on.
Complete sentence: The mailman opened the gate, and was immediately set on by a large dog.

• Set on
English Meaning: to attack somebody suddenly
Bangla Meaning: হঠাৎ আক্রমণ করা

• প্রশ্নে উল্লেখিত অপশন গুলোর মধ্যে -
ক) Set out
English Meaning: to begin a journey
Bangla Meaning:  যাত্রা করা।

গ) Set down
English Meaning:
- to write something down on paper in order to record it
​- to give something as a rule, principle, etc.
Bangla Meaning: 
- লিখে রাখা
-  আরোপ করা;

ঘ) Set apart
English Meaning: to make somebody/something different from or better than others.
Bangla Meaning: পৃথক্ করা

Source: Bangla Academy Dictionary and Oxford Learner's Dictionary.