**Core Concept**
The bimanual examination in the outpatient department is a clinical technique used to assess the pelvic floor muscles, particularly in the context of urinary incontinence or pelvic organ prolapse. This examination involves the simultaneous application of gentle pressure with two fingers to assess the tone and integrity of the pelvic floor muscles.

**Why the Correct Answer is Right**
The correct position for bimanual examination involves the patient standing with their feet shoulder-width apart and their hands on their hips, with the examiner standing behind them. This position allows for optimal access to the pelvic floor muscles and enables the examiner to apply even pressure with both hands. The examiner's fingers are placed in the vagina (in females) or rectum (in males) to assess the tone and integrity of the pelvic floor muscles.

**Why Each Wrong Option is Incorrect**
**Option A:** The lithotomy position is typically used for gynecological procedures, not for bimanual examination in the outpatient department, as it may cause discomfort and is not ideal for examination purposes.
**Option B:** The supine position is not suitable for bimanual examination, as it may cause the pelvic floor muscles to relax, making it difficult to assess their tone and integrity.
**Option C:** The squatting position may be used for examination of the lower back and gluteal muscles, but it is not ideal for bimanual examination of the pelvic floor muscles.

**Clinical Pearl / High-Yield Fact**
To perform a bimanual examination, it is essential to communicate with the patient and explain the procedure clearly, ensuring they are comfortable and relaxed throughout the examination.

**Correct Answer: C. Squatting position.**