Question

Plural of basis is

• A. Bassis
• B. Bases
• C. Basises
• D. Basium

Hint:

Words ending in -is often change to -es in the plural, like basis to bases.

Answer 1

The Correct Option is B

Basis is a Latin origin word ending in -is. Many such words form their plural by changing -is to -es. Basis becomes bases, crisis becomes crises, and analysis becomes analyses, following the same pattern.
So the plural of basis is bases, which is option B.
The other options, Bassis, Basises, and Basium, are not valid English plural forms and do not follow any recognized spelling rule.