The correct answer is option 'C' - the speaker.

Explanation:
The line "The one who is taken to task for getting baked in the sun" suggests that someone is being reprimanded or scolded for being exposed to the sun for too long. In this context, the speaker is the one who is being addressed or taken to task for getting baked in the sun. Let's understand this in more detail.

1. The poem:
The given question is based on a poem. In the poem, a group of people is introduced, each with a different occupation. The poem describes their physical appearances and the effects of their respective jobs on their bodies.

2. The gardener:
The gardener is mentioned in the poem, but he is not the one being taken to task for getting baked in the sun. The poem describes the gardener as having a hunched back and hands like claws due to his constant digging and planting.

3. The bangle-seller:
The bangle-seller is also mentioned in the poem, but he is not the one being taken to task for getting baked in the sun. The poem describes the bangle-seller as having a dusty appearance and a voice that tinkles like the bangles he sells.

4. The watchman:
The watchman is mentioned in the poem, but he is not the one being taken to task for getting baked in the sun. The poem describes the watchman as having a wrinkled face and a bundle of keys jingling at his waist.

5. The speaker:
The speaker refers to the person who is narrating the poem or speaking about the different characters. In this context, the speaker is the one being taken to task for getting baked in the sun. The poem describes the speaker as having a face that resembles a roasted papad and a voice that crackles like a parched field.

Therefore, based on the description provided in the poem, it is clear that the speaker is the one who is being scolded or taken to task for getting baked in the sun.