Determine the correctness or otherwise of the following Assertion $[\text{a}]$ and the Reason $[\mathrm{r}]$.
Assertion $[\mathrm{a}]$: In multicellular organisms, cells of different lineages have different gene expression profiles.
Reason $[\mathrm{r}]$: Alternative splicing is the only mechanism to generate protein diversity.
- Both$[\mathrm{a}]$ and $[\mathrm{r}]$ are false
- Both $[\mathrm{a}]$ and $[\mathrm{r}]$ are true and $[\mathrm{r}]$ is the correct reason for $[\mathrm{a}]$
- Both $[\mathrm{a}]$ and $[\mathrm{r}]$ are true but $[\mathrm{r}]$ is not the correct reason for $[\mathrm{a}]$
- $[\mathrm{a}]$ is true but $[\mathrm{r}]$ is false