**Core Concept**
Tetanus is a neurotoxin-mediated disease characterized by muscle rigidity, spasms, and characteristic postures due to the inhibition of inhibitory neurotransmitters in the central nervous system. The affected individual's posture can provide valuable clues about the severity of the disease.

**Why the Correct Answer is Right**
Forward bending posture is typically seen in tetanus due to the spasm of the abdominal muscles and the psoas major muscle. This spasm causes the body to arch forward, resulting in a characteristic posture. The pathophysiology involves the tetanus toxin's action on the inhibitory neurotransmitters, such as glycine and GABA, which are responsible for muscle relaxation.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because backward bending posture is typically associated with meningitis or meningismus, not tetanus.
**Option B:** This option is incorrect because lateral bending posture can be seen in various conditions, including scoliosis or osteoporosis, but it is not characteristic of tetanus.
**Option C:** This option is incorrect because opisthotonus, or backward arching, is a characteristic posture seen in severe tetanus, but not forward bending.

**Clinical Pearl / High-Yield Fact**
It's essential to note that the posture of the affected individual can provide valuable clues about the severity of tetanus. In general, the more severe the tetanus, the more pronounced the posturing will be.

**Correct Answer: A. Forward bending.**