Both antibody dependent and independent complement pathway converge on which complement component-

**Core Concept**
The complement system is a group of proteins that work together to help the immune system clear pathogens from the body. Both antibody-dependent and independent pathways converge on a key component, leading to the formation of the membrane attack complex (MAC) and the clearance of pathogens.

**Why the Correct Answer is Right**
The antibody-dependent pathway involves the binding of antibodies to pathogens, which then activates the classical pathway. This leads to the activation of C4b and C2a, which form C3 convertase (C4b2a). The alternative pathway, which is independent of antibodies, also activates C3 convertase (C3bBb). Both of these C3 convertases then converge on C3, leading to the cleavage of C3 into C3a and C3b. C3b is then responsible for the formation of the C5 convertase, which ultimately leads to the formation of the MAC.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because C1q is part of the classical pathway and does not represent the convergence point of both pathways.
**Option B:** This option is incorrect because C2 is a component of the classical pathway and is not the convergence point of both pathways.
**Option C:** This option is incorrect because C5 is the component that forms the MAC, but it is not the convergence point of both pathways.

**Clinical Pearl / High-Yield Fact**
The complement system plays a critical role in the clearance of pathogens from the body, and dysregulation of this system has been implicated in various diseases, including autoimmune disorders and infections.

**Correct Answer:** C. C3.