Select the most appropriate word to fill in the blank.

He obtained 80% marks in Science in High School. He has qualified ______ the science stream in plus two.

for

The correct word to fill in the blank is for.

The sentence "He obtained 80% marks in Science in High School. He has qualified ______ the science stream in plus two" is saying that the student has met the requirements to study science in plus two. The word "for" is the most appropriate word to use in this context, as it means "to be eligible for." The other options are not as appropriate.

• In is used to indicate a location. It does not make sense to say "He has qualified in the science stream in plus two."
• To is used to indicate a destination. It does not make sense to say "He has qualified to the science stream in plus two."
• At is used to indicate a specific point in time. It does not make sense to say "He has qualified at the science stream in plus two."