Which word is the same in both singular and plural form?

এই টপিকের আরও কিছু প্রশ্ন:

• Change the number of the word 'Belief'-
• Which one of the following is masculine gender?
• , police found a sick old Rohingya lying on his back and crying piteously for help. The un...
• There is___milk in the bottle. Choose the correct answer:
• The plural form of 'index' is _____.