Statement I: Thymine occures in `RNA`.
Statement II: `RNA` controls the synthesis of proteins.

Options

A. Statement `I` is true, Statement `II` is true, Statements `II` is the correct explanation of Statement `I`.
B. Statement `I` is true, Statement `II` is true, Statement `II` is not the correct explanation of Statement `I`.
C. Statement `I` is true, Statement `II` is false.
D. Statement `I` is false, Statement `II` is true.

Answer

To analyze the statements provided in the question, we will go through each statement step by step.

### Step 1: Evaluate Statement I
**Statement I:** Thymine occurs in RNA.

- Thymine is one of the four nitrogenous bases found in nucleic acids. The four bases in DNA are adenine (A), thymine (T), cytosine (C), and guanine (G). However, in RNA, thymine is replaced by uracil (U). Therefore, thymine does not occur in RNA.

**Conclusion for Statement I:** This statement is **False**.

### Step 2: Evaluate Statement II
**Statement II:** RNA controls the synthesis of proteins.

- RNA plays a crucial role in protein synthesis. There are three main types of RNA involved in this process:
- **mRNA (messenger RNA):** Carries the genetic information from DNA to the ribosome, where proteins are synthesized.
- **tRNA (transfer RNA):** Brings the appropriate amino acids to the ribosome during protein synthesis.
- **rRNA (ribosomal RNA):** Forms the core of the ribosome's structure and catalyzes protein synthesis.

The process of protein synthesis involves two main steps: transcription (where mRNA is synthesized) and translation (where proteins are formed). Thus, RNA is indeed responsible for controlling the synthesis of proteins.

**Conclusion for Statement II:** This statement is **True**.

### Final Evaluation
- **Statement I:** False
- **Statement II:** True

Given the evaluations, the correct answer is that Statement I is false and Statement II is true.