What is the reason for formation of Mirage in desert?1). Refraction of light2). Reflection of light3). Total internal reflection of light4). Both Refraction and Total internal reflection of light

What is the reason for formation of Mirage in desert?1). Refraction of

1.	What is the reason for formation of Mirage in desert?1). Refraction of light2). Reflection of light3). Total internal reflection of light4). Both Refraction and Total internal reflection of light
Answer» is OPTION 4 is the CORRECT ANSWER?? am i RIGHT?