$A$ change from vegetative to reproductive phase in plants occurs in response to

In some plants,flowering is induced by exposure to low temperatures,either quantitatively or qualitatively. This phenomenon is known as $........$.

In which category will you place this plant based on the provided experimental results? Choose the correct option.

The pigment phytochrome is involved in:

Which of the following is/are example/s of long day plant?
$I.$ Tomato
$II.$ Maize
$III.$ Rice
$IV.$ Radish
Choose the correct option accordingly.

Which of the following statements are $INCORRECT$ with respect to phytochrome?
$i$. Phytochrome is a light-receiving proteinaceous pigment present in the leaves of plants.
$ii$. Phytochrome pigment exists in two forms.
$iii$. Two forms of phytochromes are interconvertible.
$iv$. Phytochromes are located in the chloroplast of green cells.
$v$. Phytochrome $P_r$ form inhibits flowering in $LDP$ during the dark period.