• The correct answer is: গ) Ominous

• Bangla Meaning: দুর্লক্ষণযুক্ত; অলক্ষুণে; অশুভ

• English Meaning: being or exhibiting an omen; portentous

• Explanation: Ominous means giving the impression that something bad or unpleasant is going to happen; threatening.

Sources: Merriam-Webster Dictionary, Accessible Dictionary, Live MCQ Lecture

Answer: গ) Repetition.

• Repetition:
English meaning: the act of doing or saying something again.
Bangla meaning: পুনরাবৃত্তি। 

Example: 
- His books are full of repetition.
- We want to prevent a repetition of last summer's fires, which destroyed more than 500,000 acres of land.

Source: Cambridge Dictionary.

Of the following অপশন ক)consciencious is spelt incorrectly.
The correct spelling is - Conscientious.

• Conscientious (adjective)
English meaning: Wishing to do one's work or duty well and thoroughly
Bangla meaning: বিবেকবান, বিবেকবুদ্ধিসম্পন্ন।
Example: She was a popular and conscientious teacher.

• অন্য অপশনগুলোর মধ্যে - 
• Perseverance (noun): 
English Meaning: Continued effort to do or achieve something, even when this is difficult or takes a long time/ Persistence in doing something despite difficulty or delay in achieving success.
Bangla Meaning: নিরবচ্ছিন্ন প্রচেষ্টা;  শর্ত; প্রয়োজনীয় গুণাবলি; যোগ্যতা।
Example: It took a lot of patience and perseverance for all sides to reach an agreement.

• Convalescence (noun):
English Meaning: Time spent recovering from an illness or medical treatment; recuperation.
Bangla Meaning: রোগমুক্তির পর ক্রমে ক্রমে স্বাস্থ্য ফিরে পাওয়া
Example: I had a long convalescence ahead.

• Maintenance (noun)
English meaning: the work needed to keep a road, building, machine, etc. in good condition.
Bangla meaning: রক্ষণাবেক্ষণ; ভরণপোষণ।
Example: Old houses need a lot of maintenance.

Source: Accessible Dictionary by Bangla Academy. Oxford Learner's Dictionary.