Choose the CORRECT combination of True (T) and False (F) statements about microcarriers used in animal cell culture.

1. Higher cell densities can be achieved using microcarriers
2. Microcarriers increase the surface area for cell growth.
3. Microcarriers are used for both anchorage – and nonanchorage-dependent cells
4. Absence of surface charge on rnicrocarriers enhances attachment of cells
1. $\text{P-T, Q-F, R-T and S-F}$
2. $\text{P-T, Q-T, R-F and S-F}$
3. $\text{P-F, Q-F, R-T and S-T}$
4. $\text{P-F, Q-T, R-F and S-T}$