What is the molecular formula for the structure given below? [Image]

What is the molecular formula for the structure given below?

Select an option to attempt

1. A
   $C_{12}H_{17}ClN_4OS$
2. B
   $C_{10}H_{16}ClN_4OS$
3. C
   $C_{11}H_{16}ClN_4OS$
4. D
   $C_{13}H_{16}ClN_4OS$

Correct Answer: Option A

Explanation

Identifying the molecular structure

:The structure shown in the image is Thiamine (Vitamin B1), which consists of:• A pyrimidine ring (containing 2 nitrogen atoms and carbon/hydrogen substituents)• A thiazole ring (containing 1 sulfur and 1 nitrogen)• Connected by a methylene bridge• A chloride counterion (from HCl salt form)Molecular formula:$\text{C}_{12}\text{H}_{17}\text{ClN}_4\text{OS}$Atom count: 12 C, 17 H, 1 Cl, 4 N (2 from pyrimidine + 1 from thiazole + 1 from amino group), 1 O, 1 SAnswer:$\text{C}_{12}\text{H}_{17}\text{ClN}_4\text{OS}$(Option 1).