Each another is usually (a)____ and each lobe has (b)____ chambers

Each another is usually (a)____ and each lobe has (b)____ chambers
Each another is usually (a)____ and each lobe has (b)____ chambers
Each another is usually (a)____ and each lobe has (b)____ chambers
Each another is usually (a)____ and each lobe has (b)____ chambers

chambers