If the position vectors (-jcap-kcap), (4icap+5jcap+lambdakcap), (3icap+9jcap+4kcap) and (-4icap+4jcap+4kcap)are coplanar, than the value of lambda is
1. -1
2. 0
3. 1
4. 2

please give your choice with explanation
please specify that what is the condition of coplanar...