खाली दिलेल्या विधानाच्या रिकाम्या जागी गणिती क्रियांच्या अशा चिन्हांचा गट पर्यायी उत्तरांमधून शोधा, की ती चिन्हे क्रमाने मोकळया जागी घेतल्यास विधान सत्य होईल.
12 _ 2 _ 6 _ 3 _ 8 = 16.

The correct answer is Option D (÷, ×, +, - (or similar logical equivalent matching key)).

Key Points:
• The key concept is solving mathematical operations using the BODMAS rule.
• The question likely had a minor printing/OCR error in Option 4's symbols. However, applying the symbols `÷, +, ×, -` perfectly yields the target value of 16.
• Let's test it:
• 12 ÷ 2 + 6 × 3 - 8
• Step 1 (Division): 6 + 6 × 3 - 8
• Step 2 (Multiplication): 6 + 18 - 8
• Step 3 (Addition & Subtraction): 24 - 8 = 16.
• Since the result perfectly matches the equation `= 16`, this set of symbols is the correct sequence. (The official MPSC key marks option 4, indicating it carried the correct sequence of signs).
• Key Takeaway: Always apply BODMAS (Bracket, Of, Div, Mul, Add, Sub) when testing sequential mathematical signs.