Which one is the singular number of the following words?

এই টপিকের আরও কিছু প্রশ্ন:

• Which one of the following is the singular form of the word 'Alumni'?
• The girl, , is my acquaintance. The underline portion is?
• , police found a sick old Rohingya lying on his back and crying piteously for help. The un...
• You cannot guess . Which clause does the underlined portion indicate?...
• I know .