A star-shaped figure was cut in the black paper strip used for covering the leaf of a destarched plant used for demonstrating that light is necessary for photosynthesis. At the end of the experiment when the leaf was tested for starch with iodine, the star-shaped figure on the leaf was found to be:
![](https://search-static.byjusweb.com/question-images/img/study_content/content_ck_images/images/Pg20265_25.png)
(1) colourless
(2) green in colour
(3) brown in colour
(4) blue-black in colour