**Core Concept**
Congenital cataracts are lens opacities present at birth, which can cause vision impairment in infants. The primary goal of surgical intervention is to remove the cloudy lens and restore vision. The choice of surgical technique depends on various factors, including the size and location of the cataract, the age of the child, and the surgeon's experience.

**Why the Correct Answer is Right**
In congenital cataracts, the lens is usually soft and pliable, making it easier to remove. **Phacoemulsification** is a modern surgical technique that uses ultrasonic waves to break up the lens and aspirate it out. This method is preferred in children, as it allows for smaller incisions and faster recovery times. The use of **phacoemulsification** also enables the implantation of an intraocular lens (IOL) to correct refractive errors.

**Why Each Wrong Option is Incorrect**
**Option A:** Extracapsular cataract extraction (ECCE) is a technique that involves removing the lens capsule and cortex while leaving the posterior capsule intact. This method is not ideal for congenital cataracts, as it may require a larger incision and may lead to complications such as posterior capsule opacification.

**Option B:** Intracapsular cataract extraction (ICCE) involves removing the entire lens, including the capsule, in one piece. This technique is not recommended for congenital cataracts, as it can lead to complications such as retinal detachment and vitreous hemorrhage.

**Option C:** Manual small incision cataract surgery (MSICS) is a technique that involves making a small incision in the cornea and removing the lens through a capsulorhexis. While MSICS is a popular technique for adult cataract surgery, it may not be suitable for congenital cataracts, as it requires a larger incision and may lead to complications such as astigmatism.

**Clinical Pearl / High-Yield Fact**
Phacoemulsification is the preferred surgical technique for congenital cataracts due to its safety, efficacy, and ability to correct refractive errors with intraocular lens implantation.

**Correct Answer: C. Phacoemulsification.**