Fruit shape in shephered purse (Capsella bursa) is of two types-triangular and top-shaped. Triangular fruit shape (T) is dominant over top-shape (t). Following table summarises the results of several crosses.
`{:("Cross","Result"),("Strain 1" xx "tt","All triangular"),("Strain 2" xx "tt","1 triangular : 1 top-shaped"),("strain 3"xx "tt","All top-shaped"),("Strain 4"xx "Tt","3 triangular : 1 top-shaped"):}`
Which pair of strains possess the genotyoe Tt ?

Options

A. Strains 2 and 3
B. Strain 2 and 4
C. Strains 1 and 3
D. Strains 1 and 4

Answer

B