The size of chloroplast is 

• A

  1 to 2$\mathrm{\mu }$ wide and 5 to10$\mathrm{\mu }$ long

• B

  2 to 4$\mathrm{\mu }$ wide and 2 to5$\mathrm{\mu }$ long

• C

  2 to 4$\mathrm{\mu }$ wide and 5 to10$\mathrm{\mu }$ long

• D

  2 to 4$\mathrm{\mu }$ wide and 15 to20$\mathrm{\mu }$