The correct answer is 1 and 3.

• Hedgehog:
  • They are small mammals with short limbs and a body low to the ground.
  • Their most distinctive characteristic is the thousands of stiff, sharp spines — harder and sharper than those of a porcupine — that cover the animal’s back and sides, like a pincushion filled with needles.
  • If attacked they will curl into a prickly and unappetizing ball that deters most predators. Hence statement 1 is correct.
  • IUCN Red List Status: Least concern
• Marmot:
  • They are any of 14 species of giant ground squirrels found primarily in North America and Eurasia.
  • These rodents are large and heavy, weighing 3 to 7 kg (6.6 to 15.4 pounds), depending upon the species.
  • Marmots are well suited for life in cold environments and have small fur-covered ears, short, stocky legs, and strong claws for digging.
  • Due to the absence of scales or spines, they do not roll up and protect their vulnerable parts. Hence statement 2 is incorrect.
  • The Himalayan marmot is IUCN Red Listed as Least Concern
• Pangolin:
  • Also called scaly anteaters because of their preferred diet, pangolins are the most trafficked mammal in the world.
  • If touched or grabbed it will roll up completely into a ball, while the sharp scales on the tail can be used to lash out. Hence statement 3 is correct.
  • Eight species of pangolins are found on two continents. They range from Vulnerable to Critically Endangered.