Choose the option that correctly sequences the following sentences:

1. In February, the calves hand-raised in Kaziranga's Centre for Wildlife Rehabilitation and Conservation were brought to this area as part of a unique experiment of reintroducing them in the wild.

2. Six translocated elephant calves in the national park here are facing a threat not from poachers, but from blood-sucking parasites, prompting the authorities to drug them for temporary relief.

3. One of the calves, which suffered from restlessness after there were small pustules all over its body following the bites, had to be given antihistamine injections.

4. Tabanus flies are found in abundance during this time of the year in Manas and there is hardly any place for the calves to wallow without getting bitten.