In DNA strand at `136^(th)` position is the base thymine, then the base present at opposite strand is …………. at same position.

Options

A. Thymine
B. Adenine
C. Uracil
D. Guinine

Explanation

To determine the base present at the opposite strand of DNA when thymine is at the 136th position, we can follow these steps:

### Step-by-Step Solution:

1. **Understand DNA Base Pairing**: DNA is composed of two strands that are complementary to each other. The bases pair in a specific manner: adenine (A) pairs with thymine (T), and cytosine (C) pairs with guanine (G).

2. **Identify the Given Base**: In the question, it is stated that at the 136th position of one DNA strand, the base is thymine (T).

3. **Determine the Complementary Base**: According to the base pairing rules, thymine (T) pairs with adenine (A) on the opposite strand.

4. **Conclude the Answer**: Therefore, at the 136th position of the opposite DNA strand, the base present will be adenine (A).

### Final Answer:
The base present at the opposite strand at the same position (136th) is adenine (A).

---