The correct spelling: Reconciliation (Noun)

English meaning: The process of making it possible for two different ideas, facts, etc., to exist together without being opposed to each other.
Bangla meaning: সামঞ্জস্যবিধান; মিটমাট; পুনর্মিত্রতা; মীমাংসা।

Example sentence: After years of conflict, the two countries finally reached a reconciliation.
Bangla meaning: বহু বছরের বিরোধের পর, দুই দেশ শেষমেষ সম্প্রীতি স্থাপন করল।

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.