Which of the following is a plural number among them?

♦ এখানে Phenomena শব্দটি plural আর বাকিগুলো singular form এ আছে।

• Phenomena [Plural]
- এর Singular form হচ্ছে Phenomenon.

• প্রশ্নে উল্লেখিত বাকি অপশন গুলো:
 • Criterion: [Singular]
- English meaning: a standard by which you judge, decide about, or deal with something.
- Bangla meaning: বিচারের মাপকাঠি; মানদণ্ড।
- Plural form: criteria.

• Crises: [plural]
- Singular form: Crisis
- Meaning: সংকটকাল; চূড়ান্ত পর্যায়; সন্ধিক্ষণ।

• Sheaf: [singular]
English meaning: a number of things, especially pieces of paper or plant stems, that are held or tied together.
Bangla meaning: মুঠি; আঁটি; গুচ্ছ।
Plural form: sheaves

Source: A Passage to the English Language by S.M. Zakir Hussain, Cambridge & Accessible Dictionary.