<Tr> <Td> 18 </Td> <Td> Isfahan </Td> <Td> Iran </Td> <Td> 7006224324900000000 ♠ 2,243,249 </Td> <Td> 7006224324900000000 ♠ 2,243,249 </Td> <Td> </Td> </Tr> <Tr> <Td> 19 </Td> <Td> Beirut </Td> <Td> Lebanon </Td> <Td> 7006220000000000000 ♠ 2,200,000 </Td> <Td> 7005361366000000000 ♠ 361,366 </Td> <Td> </Td> </Tr> <Tr> <Td> 20 </Td> <Td> Sana'a </Td> <Td> Yemen </Td> <Td> 7006216700000000000 ♠ 2,167,000 </Td> <Td> 7006193745100000000 ♠ 1,937,451 </Td> <Td> </Td> </Tr> <Tr> <Td> 21 </Td> <Td> Karaj </Td> <Td> Iran </Td> <Td> 7006196700000000000 ♠ 1,967,000 </Td> <Td> 7006196700000000000 ♠ 1,967,000 </Td> <Td> </Td> </Tr>

What is the largest city in the middle east and north africa region