Choose the incorrect statement.

What is senescence? What is responsible for it?

Life span of Cow is $20-25\, years.$ What is the life span of horse?

The lifespan of an organism is defined as:

What is maintained through reproduction from generation to generation?

Choose the correct options from the following:
$I$. Annual and biennial plants show clear-cut vegetative,reproductive,and senescent phases.
$II$. Bamboo species flower only once in their life,generally after $50-100$ years.
$III$. $Strobilanthus$ $kunthiana$ is a monocarpic plant which flowers only once after $12$ years.