नामाच्या ठिकाणी जो संख्या सुचविण्याचा धर्म आहे त्याला काय म्हणतात ?

The correct answer is Option B (वचन).

Key Points:
• This is the formal grammatical definition of 'Number' (Vachan) in Marathi.
• Nouns inherently indicate whether the entity they represent is singular (one) or plural (more than one).
• This intrinsic property of a noun to suggest quantity (one vs. many) is termed 'Vachan'.
• Do not confuse this with numeral adjectives (Sankhyavisheshan), which are separate words explicitly stating a number (e.g., 'five' boys).
• Key Takeaway: The inherent property of a noun to indicate singular or plural quantity is called 'Vachan'.